Method and Apparatus for Spatial Modulation

1. A method of transmitting signals by a transmitting side device having multiple antennas (hereinafter ‘N antennas’), the method comprising: transmitting reference signals (RSs) via M antenna among the N antennas, wherein M≦N, wherein one or more of M and a sequence of antenna numbers used for transmitting RSs informs a receiving side device of first information for data transmission, and wherein the RSs are used by the receiving side device for identifying second information for channel estimation; and transmitting data to the receiving side device according to the first information.

2. The method of claim 1 , wherein the first information is represented based on a RS pattern for each of M antennas.

3. The method of claim 1 , wherein the first information comprises modulation order of the data to be transmitted.

4. The method of claim 1 , wherein the first information comprises which of MIMO transmission schemes is used for data transmission.

5. The method of claim 1 , wherein the first information comprises information for spatial modulation for data transmission.

6. The method of claim 2 , wherein different RS patterns are defined by using different time-frequency resources of one antenna.

7. The method of claim 5 , wherein the information for spatial modulation comprises a number of antennas used for data transmission and a relation between a sequence of antenna pattern and a represented signal.

8. A method of receiving signals transmitted via multiple transmission antennas (hereinafter ‘N transmission antennas’) by a receiving side device, the method comprising: detecting reference signals (RSs) transmitted via M transmission antenna among the N transmission antennas, wherein M≦N, wherein one or more of M and a sequence of RS detected transmission antenna numbers informs the receiving side device of first information for data transmission; estimating channels based on the received RSs by identifying second information for channel estimation; and receiving data from a transmitting side device based on the first information.

9. The method of claim 8 , wherein the first information is represented based on a RS pattern for each of M antennas.

10. The method of claim 8 , wherein the first information comprises modulation order of the data to be transmitted.

11. The method of claim 8 , wherein the first information comprises which of MIMO transmission schemes is used for data transmission.

12. The method of claim 8 , wherein the first information comprises information for spatial modulation for data transmission.

13. The method of claim 9 , wherein different RS patterns are defined by using different time-frequency resources of one antenna.

14. The method of claim 12 , wherein the information for spatial modulation comprises a number of antennas used for data transmission and a relation between a sequence of antenna pattern and a represented signal.